JP7119388B2 - Ovality measurement sensor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary kiln overload measuring sensor that is attached to a rotary kiln to measure the displacement of the rotary kiln.

A rotary kiln (rotary kiln) used in waste incineration equipment, cement manufacturing equipment, etc. is composed of a long heavy object (fuselage) formed in a cylindrical shape, as described in Patent Document 1, for example. It is supported by a plurality of tires arranged in parallel along the axial direction of the body and rollers rolling on the tires. For this reason, as described in Patent Document 1, when a rotary kiln is operated for a long time, uneven wear of tires and rollers, sedimentation of the kiln support base (sinking of the body), and thermal deterioration occur. It is known that in the initial stage when these phenomena occur, the body is distorted, and the overty (transformation rate of the body) increases.

Further, Patent Document 2 describes an example of a deformation measuring device using a differential transformer as a measuring device for measuring deformation in the diametrical direction of a rotary furnace. In this deformation measuring device, a long and narrow beam to which a differential transformer is fixed is held at a constant distance from the outer surface of the rotary furnace, and the contactor at the tip of the operating shaft of the differential transformer is always pushed downward by a spring. By measuring the amount of displacement of the operating shaft which is brought into contact with the outer surface and displaced up and down according to the deformation state of the outer surface of the rotary furnace, the amount of deformation (overness) of the rotary furnace is calculated. In this deformation measuring device, legs are fixed to the left and right ends of the beam, and the beam is held at a constant distance from the outer surface of the rotary furnace by the tips of these legs coming into contact with the outer surface of the rotary furnace. ing. A differential transformer insertion hole is formed in the center of the beam so that the operating shaft, spring, and contactor of the differential transformer are exposed below the beam.

JP 2014-185788 A JP-A-62-34002

Thermoelectric Power Generation System in Municipal Waste Combustion Furnace Proceedings of the Japan Society of Mechanical Engineers Thermal Engineering Conference No.97-25 C133 1997.11.5～7

However, in the deformation measuring device (overty measuring sensor) as described in Patent Document 2, since the contactor at the tip of the operating shaft of the differential transformer (measuring device) is brought into direct contact with the outer surface of the high-temperature rotary furnace, long-term measurement cannot be performed continuously. In other words, there is concern that the differential transformer itself will be exposed to high temperatures, causing problems in long-term use.
On the other hand, in order to prevent troubles from occurring or to minimize damage when troubles occur, it is desirable to continuously measure various inspection items in the overness measuring sensor. For this reason, it is considered to use a thermoelectric generation system as described in Non-Patent Document 1 as an overage measurement sensor to eliminate the need for battery replacement.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an overage measuring sensor that can eliminate the need for battery replacement and that can be used for a long period of time even at high temperatures.

The overness measuring sensor of the present invention includes a pair of mounting portions that can be fixed at intervals in the circumferential direction of a cylindrical outer peripheral surface of a rotary furnace, an elastically deformable deformable plate suspended between the mounting portions, a supporting member fixed to the deformable plate between the mounting portions and supporting the deformable plate by coming into contact with the rotary furnace when both the mounting portions are fixed to the rotary furnace; and a strain gauge for detecting the strain value of the deformation plate, a control unit for controlling the strain gauge and communicating with an external device, a thermoelectric converter for supplying power to the strain gauge and the control unit, and the thermoelectric converter includes a heat absorbing portion that can contact the rotary furnace when both mounting portions are fixed to the rotary furnace, and a heat absorbing portion provided on the side opposite to the rotary furnace a thermoelectric generation module; and a radiator fixed to a surface of the thermoelectric generation module opposite to the heat absorption section, wherein the thermoelectric conversion module and the heat absorption section are positioned on the rear surface side of the deformable plate. , the thermoelectric generation module is provided between the heat absorption part and the deformation plate, the radiator is fixed to the surface of the deformation plate opposite to the thermoelectric generation module, and the support member is provided with the It consists of a heat absorption part and the thermoelectric generation module.

In the present invention, when the mounting portion is fixed to the cylindrical outer peripheral surface of the rotary furnace, the deformable plate is supported on the cylindrical outer peripheral surface at three points, the pair of mounting portions and the supporting member. Therefore, when the cylindrical outer peripheral surface is deformed, it is elastically deformed so as to follow the change of the surface shape along with the deformation. By detecting the strain value of the elastically deformed deformation plate with a strain gauge, the displacement of the rotary furnace can be measured more reliably. In addition, since the deformation plate is supported at the above three points with a gap from the rotary furnace, it is possible to prevent the deformation plate from becoming hot. As a result, the displacement of the outer surface of the rotary furnace can be continuously measured and monitored over a long period of time. In this case, when the mounting portion is fixed to the cylindrical outer peripheral surface of the rotary furnace, the heat absorbing portion abuts against the rotary furnace (cylindrical outer peripheral surface), so that the heat of the rotary furnace can be reliably absorbed by the heat absorbing portion. Heat can be transferred to the thermoelectric generator module. In addition, since the radiator is fixed to the surface of the thermoelectric generation module opposite to the heat absorbing portion, the heat from the thermoelectric generation module can be reliably radiated, and the thermoelectric converter configured by these can improve the power generation efficiency. can be done. Therefore, power can be supplied substantially permanently to the control unit and the strain gauge, eliminating the need to replace the battery, and measuring the displacement of the cylindrical outer peripheral surface (outer surface) of the rotary furnace over a long period of time.

Further, when the mounting portions are fixed to the cylindrical outer peripheral surface of the rotary furnace, the deformation plate is supported on the cylindrical outer peripheral surface at three points: the pair of mounting portions, the heat absorbing portion of the thermoelectric converter, and the thermoelectric power generation module. be.
In addition, since the support member is composed of the heat absorbing part of the thermoelectric converter and the thermoelectric power generation module, there is no need to provide a separate support member, and the thermoelectric converter is provided on the deformation plate, so the oversize measuring sensor can be miniaturized. can.

As a preferred aspect of the overness measuring sensor of the present invention, the control section may be provided on the opposite side of the heat radiator to the surface fixed to the deformation plate.
In the above aspect, the control unit is arranged on the opposite side of the heat sink to the surface fixed to the deformation plate, that is, at a position away from the rotary furnace, so that the control unit is prevented from being exposed to the heat of the rotary furnace. can be suppressed with certainty.

In a preferred embodiment of the overness measuring sensor of the present invention, both mounting portions are fixed to both ends of the deformation plate, and the thermoelectric converter is fixed to the deformation plate at an intermediate position between the mounting portions, Two strain gauges are provided between the thermoelectric converter and both mounting portions, and the two strain gauges are provided to face each other with the deformation plate interposed therebetween. are connected to constitute a bridge circuit of the 4-gauge method.
In the above aspect, two strain gauges are provided facing each other across the deformation plate between the thermoelectric converter and both mounting portions, and the four strain gauges are connected to form a bridge circuit of the 4-gauge method. Therefore, the difference in degree of deformation (bending strain) between the left and right sides of the deformable plate can be averaged by using the thermoelectric converter as the central portion of the deformable plate. In addition, when the deformation plate expands due to thermal expansion, strain gauges are bridge-connected to the top and bottom of the deformation plate. can only be output. That is, it is possible to increase the output while removing the influence of expansion and contraction of the deformation plate due to temperature, and improve the accuracy of the strain value.

As a preferred aspect of the overness measuring sensor of the present invention, a heat shield plate may be provided facing the strain gauge, located on the side of the deformation plate on which the mounting portion is provided.
In the above aspect, since the heat shield provided facing the strain gauge is located on the side where the mounting portion of the deformation plate is provided, the heat of the rotary furnace is transmitted to the strain gauge by the heat shield. It is possible to reduce the possibility that the strain gauge will deform or fail due to heat.

ADVANTAGE OF THE INVENTION According to this invention, the battery replacement|exchange can be made unnecessary, and the overness measuring sensor which can be used for a long period of time also at high temperature can be provided.

1 is a perspective view of an overness measuring sensor according to a first embodiment of the present invention; FIG. FIG. 2 is a front view of the overload measurement sensor shown in FIG. 1; FIG. 2 is a side view of the overload measurement sensor shown in FIG. 1; FIG. 2 is a diagram showing a state in which the overload measurement sensor shown in FIG. 1 is fixed to the outer surface of the rotary furnace; It is a front view of the overness measuring sensor which concerns on 2nd Embodiment of this invention. FIG. 6 is a side view of the overload measurement sensor shown in FIG. 5; It is a front view of the overness measuring sensor which concerns on 3rd Embodiment of this invention. FIG. 8 is a side view of the overload measurement sensor shown in FIG. 7;

[First embodiment]
A first embodiment of the present invention will be described below with reference to the drawings.
[Schematic configuration of the overness measurement sensor]
1 to 3 according to the first embodiment of the present invention is, as shown in FIG. 4, a rotary kiln rotary furnace (steel pipe, It is mounted on the cylindrical outer peripheral surface 91 of the shell 9 and measures the distortion (deformation amount) of the rotating rotary furnace 9 .
The overness measuring sensor 1 includes a pair of mounting portions 2 that can be fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9, an elastically deformable deformable plate 3 suspended between the mounting portions 2, and the surface of the deformable plate 3. A strain gauge 4 that detects the strain value of the deformation plate 3, a control unit 5 that measures the strain value of the strain gauge 4 and communicates with an external device, and a deformation plate between both mounting portions 2 3 and includes a thermoelectric converter 6 that supplies power to the strain gauge 4 and the control unit 5 , and a thermocouple 7 that detects the temperature of the rotary furnace 9 .

[Configuration of mounting part]
The mounting portions 2 are fixed to both ends of the rear surface 31 of the deformable plate 3 and are composed of magnets that can be fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9 . This magnet is composed of a resistant magnet, such as an alnico magnet or a samarium-cobalt magnet, which has a high Curie temperature and can be used at high temperatures.
[Configuration of deformation plate]
As shown in FIG. 2, the deformable plate 3 is an elastically deformable non-magnetic metallic steel plate formed in a substantially rectangular strip shape in plan view. The deformation plate 3 is made of, for example, SUS304 (stainless steel). In this embodiment, the deformation plate 3 has a short side length of 50 mm, a long side length of 300 mm, and a thickness of 1 mm. Mounting portions 2 are fixed to both ends of the rear surface 31 of the deformation plate 3 . The height of this mounting portion 2 is, for example, about 10 mm to 20 mm.
A handle 21 is fixed to the upper side of the mounting portion 2 on the surface 32 of the deformation plate 3 . Furthermore, a thermoelectric generation module 62 of the thermoelectric converter 6 is fixed to the approximate center of the rear surface 31 of the deformation plate 3 via a metal plate 64, and a radiator 63 is fixed to the front surface 32 of the deformation plate 3. .

[Configuration of strain gauge]
The strain gauge 4 has a resistor formed of a metal foil or a resistance wire on a base made of an electrical insulator, and a lead wire is attached to the resistor. The strain gauge 4 is fixed to the front surface 32 and the back surface 31 of the deformation plate 3, which is the object to be measured, with an adhesive or the like. As a result, the resistance value (voltage) changes, and this change is detected.
As shown in FIGS. 1 and 3, two such strain gauges 4 are provided between the thermoelectric converter 6 and both mounting portions 2, and the two strain gauges 4 are arranged with the deformation plate 3 interposed therebetween. They are provided in parallel facing each other. Although not shown, these four strain gauges are connected to form a bridge circuit of the 4-gauge method, and are connected to the controller 5 .

[Configuration of control unit]
The control unit 5 communicates with an external device (for example, a computer capable of wireless communication). Further, the controller 5 is equipped with a memory (not shown). Thereby, for example, the control unit 5 calculates a strain value from the potential difference appearing in the bridge circuit, and transmits it to an external device (not shown).
In addition, such a control unit 5 is provided on the opposite side of the heat sink 63 to the surface fixed to the deformation plate 3 , that is, on the upper side of the heat sink 63 , and the overage measurement sensor 1 is provided on the rotary furnace 9 . It prevents exposure to the heat of the rotary furnace 9 when attached.

[Configuration of thermoelectric converter]
The thermoelectric converter 6 has, as shown in FIG. and a radiator 63 fixed to the surface 32 of the deformation plate 3 on the side opposite to the thermoelectric generation module 62, and the temperature difference between the heat absorption part 61 and the radiator 63 is is used to generate power by the thermoelectric power generation module 62 . Electric power generated by the thermoelectric generation module 62 is supplied to the control unit 5 and further supplied to the strain gauge 4 via the control unit 5 .
The heat absorbing portion 61 is made of a material with high thermal conductivity such as aluminum or copper. In this embodiment, the heat absorbing portion 61 is made of a rectangular metal plate made of aluminum. The heat absorbing portion 61 abuts against the cylindrical outer peripheral surface 91 of the rotary furnace 9 and absorbs the heat of the rotary furnace 9 when the mounting portion 2 is fixed to the rotary furnace 9 . A thermoelectric generation module 62 and a thermocouple 7 are mounted on the surface of the heat absorption portion 61 on the deformation plate 3 side, and the heat of the rotary furnace 9 is transmitted to the thermoelectric generation module 62 and the thermocouple 7 via the heat absorption portion 61. It has become so.

Although not shown, the thermoelectric generation module 62 has a pair of P-type thermoelectric conversion elements and N-type thermoelectric conversion elements arranged alternately in the order of P-type, N-type, P-type, and N-type between wiring boards. As shown in FIG. 1, the two wiring substrates are electrically connected in series, and a temperature difference is applied between the two wiring substrates to generate an electromotive force in each thermoelectric conversion element by the Seebeck effect. A ceramic plate (not shown) is arranged on each of the heat absorption side and the heat dissipation side of the thermoelectric generation module 62 to insulate them.
The thermoelectric generation module 62 is fixed to the deformable plate 3 via a rectangular metal plate 64 made of aluminum or the like, and magnets 65 are arranged around the metal plate 64 . The magnets 65 are arranged at the four corners of the thermoelectric power generating module 62, and are made of resistant magnets such as alnico magnets and samarium cobalt magnets, which have a high Curie temperature and can be used at high temperatures. The diameter is set to 16 mm, for example. The thermoelectric power generation module 62 and the magnet 65 are sandwiched and fixed between the heat absorbing portion 61 and the metal plate 64 .
The heat absorption part 61 and the thermoelectric power generation module 62 are positioned on the back surface 31 side of the deformation plate 3, and the heat absorption part 61 contacts the cylindrical outer peripheral surface 91 when the mounting part 2 is fixed to the rotary furnace 9. Since they support the deformable plate 3 in contact with each other, the heat absorbing portion 61 and the thermoelectric generation module 62 constitute a supporting member of the present invention.

The radiator 63 is a so-called heat sink, and is made of a highly thermally conductive material such as aluminum or copper. In this embodiment, the heat radiator 63 is made of aluminum having an excellent balance between heat dissipation and strength, and is a flat plate-shaped heat sink fixed at a position facing the thermoelectric generation module 62 on the surface 32 of the deformable plate 3 . It has a diffusing portion 631 and a plurality of band plate-shaped heat radiating fins 632 erected on the upper surface of the thermal diffusing portion 631 opposite to the surface fixed to the deformation plate 3 . The heat radiating fins 632 facilitate the circulation of the outside air between the plurality of strip-shaped heat radiating fins 632 when the overload measuring sensor 1 is fixed to the rotary furnace 9 and the overload measuring sensor 1 rotates together with the rotating furnace 9. Therefore, it is formed along the rotation direction. The height dimension of such heat radiation fins 632 is set to, for example, 50 mm.

Since the thermal diffusion portion 631 and the thermoelectric generation module 62 are arranged to face each other with the deformation plate 3 interposed therebetween, the heat of the thermoelectric generation module 62 transferred from the lower surface of the thermal diffusion portion 631 is transferred to the thermal diffusion portion 631. , the heat is diffused toward the heat radiation fins 632 and is released to the outside air by the heat radiation fins 632 having a large surface area. Therefore, in the radiator 63, the temperature becomes lower as it moves away from the thermoelectric generation module 62, that is, as it moves from the lower surface side of the thermal diffusion part 631 toward the tip side of the heat radiation fin 632, and the upper side of the radiator 63 is lower than the lower side. becomes low temperature. In the radiator 63, the tip side of the heat radiation fins 632 has the lowest temperature.

Then, in the overage measuring sensor 1, the control unit 5 is located on the low temperature side of the radiator 63 away from the thermoelectric generation module 62 and on the tip side of the heat radiation fins 632 where the temperature is the lowest in the radiator 63. are placed via spacers 66 . In addition, the control unit 5 may be arranged at a position away from the thermoelectric generation module 62 of the radiator 63. By arranging the control unit 5 away from the thermoelectric generation module 62, heat is transferred to the control unit 5. can be suppressed.

Although the radiator 63 has the flat plate-shaped heat diffusion portion 631 and the strip-shaped heat dissipation fins 632, the shape of the radiator is not limited to this. A shape in which a plurality of pin-shaped heat radiation fins are erected on the upper surface of the diffusing portion 631 can be adopted, or a radiator having another shape that is appropriately changed according to the configuration of the overage measuring sensor 1 is adopted. can do.

[Method of mounting the overness measurement sensor to the rotary furnace]
Such an overness measuring sensor 1 is fixed (mounted) to the rotary furnace 9 by, for example, the following procedure.
First, the user grips the handles 21 on both sides of the overage measuring sensor 1 and brings the mounting portion 2 into contact with the cylindrical outer peripheral surface 91 of the rotary furnace 9 . At this time, since the mounting portion 2 is made of a magnet or the like, it is fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9 by magnetic force. When the mounting portion 2 is fixed to the rotary furnace 9 in this way, both ends of the deformation plate 3 are pulled toward the rotary furnace 9, and the heat absorbing portion 61 of the thermoelectric converter 6 located in the central portion of the deformation plate 3 is also It abuts on the rotary furnace 9 . In addition, the thermoelectric power generation module 62 is positioned above the heat absorbing section 61 , and four magnets 65 are positioned around it. It abuts securely on the surface 91 .
As described above, since the two mounting portions 2 and the heat absorbing portion 61 are in contact with the cylindrical outer peripheral surface 91 of the rotary furnace 9, the deformation plate 3 is supported at three points by these. Therefore, when the cylindrical outer peripheral surface 91 is deformed in the portion between the mounting portions 2, the deformable plate 3 follows the deformation of the cylindrical outer peripheral surface 91 as shown in FIG. elastically deformed. The deformation of the deformation plate 3 elastically deformed in this way is detected by four strain gauges, and the displacement of the cylindrical outer peripheral surface 91 of the rotary furnace 9 is calculated.

In the above embodiment, when the mounting portion 2 is fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9, the heat absorbing portion 61 contacts the rotary furnace 9 (cylindrical outer peripheral surface 91). The heat can be reliably absorbed by the heat absorbing portion 61 and the heat can be transferred to the thermoelectric generation module 62 . Further, since the radiator 63 is fixed to the surface 32 of the deformable plate 3 on the side opposite to the thermoelectric generation module 62, the heat from the thermoelectric generation module 62 can be reliably radiated, and the thermoelectric converter 6 composed of them. It is possible to increase the power generation efficiency by Therefore, power can be supplied substantially permanently to the control unit 5 and the strain gauge 4, the need for battery replacement is eliminated, and the displacement of the cylindrical outer peripheral surface 91 (outer surface) of the rotary furnace 9 can be measured over a long period of time.
In addition, since the deformation plate 3 is supported at the above three points with a gap from the rotary furnace 9, it is possible to prevent the deformation plate 3 from becoming hot. As a result, the displacement of the outer surface of the rotary furnace 9 can be continuously measured and monitored over a long period of time.

In addition, since the control unit 5 is arranged at a position away from the rotary furnace 9, that is, on the heat radiation fins 632 of the radiator 63 via the spacer 66, the control unit 5 is not exposed to the heat of the rotary furnace 9. can be reliably suppressed.
Furthermore, two strain gauges 4 are provided between the thermoelectric converter 6 and both mounting portions 2 so as to face each other with the deformation plate 3 interposed therebetween, and the four strain gauges 4 are connected to form a bridge circuit of the 4-gauge method. Therefore, the difference in the degree of deformation (bending strain) between the left and right sides of the deformation plate 3 can be averaged by using the thermoelectric converter 6 as the central portion of the deformation plate 3 . In addition, the output can be increased while removing the effect of expansion and contraction of the deformation plate 3 due to temperature, and the accuracy of the strain value can be improved. Therefore, the displacement of the cylindrical outer peripheral surface 91 of the rotary furnace 9 can be reliably detected.

[Second embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a plan view of the excessiveness measuring sensor 1A of this embodiment, and FIG. 6 is a side view of the excessiveness measuring sensor 1A.
As shown in FIGS. 5 and 6, the oversize measuring sensor 1A differs from the above-described first embodiment in that it has a slide plate 8 and two mounting portions 2 are provided at each end of the deformable plate 3 .
In addition, in the following description, the same or substantially the same configuration as that of the first embodiment is given the same number, and the description is omitted or simplified.
As shown in FIGS. 5 and 6, the oversize measuring sensor 1A is located on the side of the deformation plate 3 on which the mounting portion 2 is provided, and the sliding plate 8 is provided facing the strain gauge 4. As shown in FIG. The slide plate 8 is formed in a substantially rectangular strip shape that is wider than the deformation plate 3 and protrudes on both sides in a plan view, and is made of an elastically deformable non-magnetic metal having an area equal to or larger than that of the deformation plate 3. steel plate. Like the deformation plate 3, the sliding plate 8 is made of SUS304 (stainless steel), for example. In this embodiment, the slide plate 8 has a short side length of 75 mm, a long side length of 300 mm, and a thickness of 0.5 mm. Further, in this embodiment, the sliding plate 8 is fixed to the heat absorbing portion 61 .
As shown in FIG. 6, such a sliding plate 8 is positioned below the mounting portion 2, and when the mounting portion 2 is fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9, abut. Moreover, in this embodiment, two mounting portions 2 are arranged at each end of the deformation plate 3, and a handle 21 is mounted on the upper side thereof. As a result, the deformation plate 3 can be more firmly fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9 .

In this embodiment, since the mounting portion 2 is arranged on the upper side of the non-magnetic sliding plate 8, the mounting portion 2 can be slid and moved on the sliding plate 8, and the shape of the deformation plate 3 can be changed. can reliably follow the deformation of the cylindrical outer peripheral surface 91 of the rotary furnace 9 .

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a plan view of the excessiveness measuring sensor 1B of this embodiment, and FIG. 8 is a side view of the excessiveness measuring sensor 1B.
7 and 8, the thermoelectric converter 6 is fixed to the deformation plate 3, while the thermoelectric converter 6B is separated from the deformation plate 3, and the deformation plate 3 and the thermoelectric converter 6B are separated. is different from the first embodiment in that the thermoelectric converter 6B is supported by a different support plate 8B. It is also different from the first embodiment in that the height dimension of the heat radiation fins 632B of 63B is large, the support plate 8B is provided, and the magnets 68 and 69 are further provided under the support plate 8B.
In addition, in the following description, the same or substantially the same configuration as that of the first embodiment is given the same number, and the description is omitted or simplified.
As shown in FIGS. 7 and 8, the overage measuring sensor 1B is provided with a support plate 8B located on the side (lower side) where the mounting portion 2 of the deformation plate 3 is provided and facing the strain gauge 4. It is That is, the support plate 8B functions as a heat shield plate of the present invention.
This support plate 8B has a shape that protrudes on both sides wider than the deformation plate 3 in a plan view. is large. The support plate 8B is made of an aluminum plate or the like.

Specifically, the support plate 8B includes a main body portion 81B having a substantially rectangular strip shape in a plan view, and a first overhang projecting outward from substantially the center of one end (the upper side in FIG. 7) of the main body portion 81B. A portion 82B and a second projecting portion 83B projecting outward from substantially the center of the end portion on the other side (lower side in FIG. 7) of the main body portion 81B. Of these, the first protruding portion 82B protrudes further outward than the second protruding portion 83B, and its area is formed to be larger than the area of the second protruding portion 83B. As shown in FIG. 7, the thermoelectric converter 6B is arranged on the first projecting portion 82B. That is, in the present embodiment, the thermoelectric converter 6B is fixed at a position not overlapping the deformation plate 3 in plan view on the support plate 8B.
Further, on the lower side of the support plate 8B (on the side of the cylindrical outer peripheral surface 91 of the rotary furnace 9), a magnet 68 made of a resistant magnet such as an alnico magnet or a samarium-cobalt magnet, which has a high Curie temperature and can be used at high temperatures. , 69 are arranged. Specifically, the magnet 68 is arranged below the second protruding portion 83B of the support plate 8B, and the magnet 69 is arranged below the main body portion 81B and substantially in the center of the deformation plate 3 in plan view. be done. Therefore, as shown in FIG. 8, the support plate 8B is different from the sliding plate 8 in the second embodiment, and when the mounting portion 2 is fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9, the cylindrical outer peripheral surface It does not contact the surface 91 .

In this embodiment, two mounting portions 2 are arranged at each end of the deformation plate 3 with spacers 22 interposed therebetween, and a handle 21 is mounted on the upper side thereof. The lower surface of the mounting portion 2, the magnets 68 and 69, and the lower surface of the heat absorbing portion 61 of the thermoelectric converter 6B are located on the same plane. Thereby, the deformable plate 3 can be more stably fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9 .

Further, the height dimension of the heat radiation fins 632B of the radiator 63B is approximately twice (eg, 90 mm) the height dimension of the heat radiation fins 632 (eg, 50 mm).
Also, the heat diffusion part 631 is fixed on the first projecting part 82B of the support plate 8B, and the metal plate 64 is arranged below the first projecting part 82B.

In addition, the oversize measuring sensor 1B includes four studs 66B in place of the spacers 66. These four studs 66B are arranged on both sides of the deformation plate 3, two on each of the main body portion 81B and the second protruding portion 83B. , supporting the control unit 5 . As a result, even if the control unit 5 is not supported on the upper side of the radiator 63B, the control unit 5 is fixed on the support plate 8B by the four studs 66B, so that the control unit 5 is not directly exposed to the heat of the rotary furnace 9. is suppressed.
A columnar spacer 67 is arranged between the deformation plate 3 and the support plate 8B, and the spacer 67 is fixed between the deformation plate 3 and the support plate 8B so as to overlap the magnet 69 in plan view. ing. That is, the spacer 67 is arranged at a position facing the magnet 69 via the support plate 8B, and fixes the deformation plate 3 and the support plate 8B. Thereby, the central portion of the deformation plate 3 is supported by the magnet 69 via the spacer 67 . That is, the magnet 69 and spacer 67 correspond to the support member of the present invention.

Here, for example, if the thermoelectric converter 6B is fixed to the center of the deformable plate 3 as in each of the above embodiments, the deformable plate 3 that is in contact with the radiator 63 and the metal plate 64 is It is difficult to trace the deformation of the cylindrical outer peripheral surface 91 of the .
On the other hand, in the present embodiment, the thermoelectric converter 6B is provided on the first projecting portion 82B of the support plate 8B, that is, provided at a position not overlapping the deformation plate 3 in plan view. are supported by the spacers 67 (magnets 69) having a smaller contact area with the deformation plate 3 than the thermoelectric converter 6B. When the mounting portion 2 is fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9, the deformable plate 3 is supported at three points with a gap from the rotary furnace 9 by both the mounting portions 2 and the magnets 69. Also in this embodiment, it is possible to suppress the deformation plate 3 from becoming hot.
Further, since the support plate 8B is provided, the strain gauge 4 can be prevented from being exposed to the heat of the rotary furnace 9.
Furthermore, when the mounting portion 2 is fixed to the cylindrical outer peripheral surface 91 of the rotary furnace 9, the heat absorbing portion 61 of the thermoelectric converter 6B is in contact with the heat absorbing portion 61, so that the heat of the rotary furnace 9 is surely absorbed by the heat absorbing portion 61. It is possible to improve the power generation efficiency of the thermoelectric converter 6B.

In addition, detailed configurations are not limited to those of the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
For example, the deformation plate 3 is made of SUS304 (stainless steel) or the like.

1 1A 1B Ovality measurement sensor 2 Mounting portion 21 Handle 22 Spacer 3 Deformation plate 31 Back surface 32 Front surface 4 Strain gauge 5 Control unit 6 6B Thermoelectric converter 61 Heat absorption unit (supporting member)
62 Thermoelectric power generation module (support member)
63 63B Radiator 631 Thermal diffusion part 632 632B Heat radiation fin 64 Metal plate 65 Magnet 66 Spacer 66B Stud 67 Spacer 68 Magnet 69 Magnet (support member)
7 Thermocouple 8 Slide plate 8B Support plate (heat shield plate)
81B Body portion 82B First projecting portion 83B Second projecting portion 9 Rotary furnace 91 Cylindrical outer peripheral surface

Claims (4)

A pair of mounting portions that can be fixed at intervals in the circumferential direction of the cylindrical outer peripheral surface of the rotary furnace, an elastically deformable deformation plate suspended between the mounting portions, and the deformation plate between the mounting portions. and a support member that abuts against the rotary furnace and supports the deformation plate when both mounting portions are fixed to the rotary furnace, and a strain value of the deformation plate provided on the surface of the deformation plate a strain gauge that detects the strain gauge, a control unit that controls the strain gauge and communicates with an external device, and a thermoelectric converter that supplies power to the strain gauge and the control unit,
The thermoelectric converter includes a heat absorbing portion that can come into contact with the rotary furnace when both mounting portions are fixed to the rotary furnace, and a thermoelectric generation module provided on the opposite side of the heat absorbing portion from the rotary furnace. and a radiator fixed to the surface of the thermoelectric power generation module opposite to the heat absorption part,
The thermoelectric conversion module and the heat absorption section are positioned on the back side of the deformation plate, the thermoelectric generation module is provided between the heat absorption section and the deformation plate, and the radiator is the thermoelectric generation module. fixed to the surface of the deformable plate on the opposite side, and the support member comprises the heat absorbing portion and the thermoelectric generation module. 2. The oversize measuring sensor according to claim 1, wherein the control section is provided on a side of the heat radiator opposite to the side fixed to the deformation plate. both mounting portions are fixed to both ends of the deformation plate, and the thermoelectric converter is fixed to the deformation plate at an intermediate position between the mounting portions;
Two strain gauges are provided between the thermoelectric converter and both mounting portions, and the two strain gauges are provided facing each other with the deformation plate interposed therebetween,
3. The overload measuring sensor according to claim 1, wherein each of said four strain gauges is connected to form a bridge circuit of a 4-gauge method. 4. The heat shield plate according to any one of claims 1 to 3, wherein a heat shield plate is provided on the side of the deformable plate on which the mounting portion is provided and faces the strain gauge. Ovality measurement sensor.

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